Regarding "Matte Screen Filter".. I've tried a few similar apps and while they seem to dim the screen (no doubt), I am not so sure if they are doing this by actually reducing the display's brightness. Rather, it feels like it is just a (gray?) overlay on entire screen. So, how much battery does this actually save? If I understand correctly, OLED displays when displaying black the pixel(s) are turned off. So, wouldn't the overlay still light them to some extent?
Using S3's "negative colors" under accessibility, you can see the haze of these filters on a true black wallpaper. Did anyone try this and more importantly, is there any app that can "really" dim the screen without these overlay filters?
In future, we integrate more into the phone or phone integrates more into us?